Drilling-machine.



Patented lan. 2, |900.

(Application mea mr. "2o, 1s99'.)

2 Sheets-Sheet l.

(No Model.)

nomu'ywo., wAsnmcron. u4 c.

No. 640,708. Patented 1an. 2, |900.

C. SCHMIDT.

DRILLING MACHINE.

(Application med Mm. 20, 1899.)

(No Model.) 2 Sheets-Sheet 2.

TH: Hemus Pneus co.. PHowLmw; w As UNITED STATES PATENT EEICE.

CHARLES SCHMIDT, OF AYRSHIRE, INDIANA.

DRILLING- SPECIFICATION forming part of Letters Patent No. 640,708, dated January 2,

Application filed March 20, 1899.

T0 a/ZZ whom t may concern:

Be it known that I, CHARLES SCHMIDT, a citizen of the United States, residing at Ayrshire, in the county of Pike and State of Indiana, have invented a new and useful Drilling-Machine, of which the followingis a speciication.

The invention relates to improvements in drilling-machines.

The object of the presentinventionis to improve the construction of drilling-machines and to provide a simple, inexpensive, and efcient one adapted after it has been anchored in one position to be readily adjusted for drilling holes in different directions and capable after a bit or auger has been driven into a bed of coal or other material to be readily arranged to receive an extension bit or auger without removing the cutting bit or auger from the hole.

A further object ofV the invention is to enable the drilling-machine to be operated from either side of it, to suit the convenience of the operator and the position of the machine, and to provide means for enabling the auger or bit to be adjusted both vertically and laterally.

The invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the claims hereto appended.

In the drawings, Figure 1 is a perspective view of a drilling-machine constructed in accordance with this invention. Fig. 2 is a central longitudinal sectional View. v Fig. 3 is a horizontal sectional view. Fig. 4 is a transverse sectional view on line 4 4 of Fig. 2. Fig. 5 is a similar View on line 5 5 of Fig. 2. Fig. 6 is a detail perspective view of the front support. Fig. 7 is a similar view of the rear sup port. Fig. Sis a detail perspective view of the transverse casing. Fig. 9 is a detail view of the extension-section of the auger.

Like numerals of reference designate corresponding parts in all the figures of the drawings.

l 1 designate a pair of parallel shafts spaced apart and adapted to receive a bit or auger 2 between them'and connected at their front ends by a cross bar or yoke 3, which is adjustably mounted in a front support 4 and MACHINE.

Serial No. 709,842. (No model.)

which has a central depressed portion 5 to clear the auger. The front ends of the parallel shafts 1 are reduced to form shoulders for engaging the cross-bar 3, and they extend through perforations of the same and receiveV nuts 6, which secure them to the ends of the cross-bar.

The front support 4, which is substantially U -shaped, is provided with a central depending stem 7, and its sides are provided at intervals with horizontally-alined recesses S, adapted to receive the cross-bar 3, whereby the bit or auger is raised or lowered.

The rear portions of the longitudinal shaft 1 are journaled in bearing-openings of a crossbar 9, provided at its ends with pivots or trunv nions 10, arranged in arms 11 of a substan tially U -shaped rear support 12 and adapted to form a fulcrum for the operating mechanism of the drilling-machine.. The U-shaped rear support, which is provided With a de- A- pending stem 13, consists of a horizontal bot tom portion and a pair of short upwardly-extending arms having opening-bearings for the said journals or trunnions to permit the shaft 1 and the mechanism carried by the same to be readily removed.

The front and rear supports are connected by a longitudinal bracing-rod 14, provided at its rear end with an eye 15 to receive the rod or stem 13 and having at its front end a curved guide 16 and an eye 17, located a short distance in rear of the guide and receiving the stem of the front support. The depending stems of the front and rear supports are threaded for the reception of nuts 18 and 19, provided with handles to enable them to be readily adjusted, and the rear nut supports the longitudinal bracing-rod 14. The front end of the bracing-rod extends into a bifurcation 20 of an anchor 21, which is provided at the sides of its bifurcation with perforations registering with the front eye of the bracing-rod and receiving the depending stern of the front support. By this construction the drilling-machine is pivotally connected with the anchor and is adapted to be swung laterally With the front depending stem as a pivot, and the curved guide, which is arranged in the bifurcation of the anchor, supports the machine in any of its adjusted positions.

ICO

The front portion of the auger or bit is supported by the central depressed portion of the front cross-bar, which unites the front ends of the shafts l, and the rear end of the auger is connected with a central gear-Wheel 22, journaled on a transverse casing 24 and meshing with side gear-wheels 23, Which are adapted to rotate the threaded shaftl in the same direction. The shafts l are provided with longitudinal grooves 25 for the reception of feathers or splines of the side gears,

which bear against the transverse casing. The transverse casing, which constitutes a feeding device for advancing the anger,is provided at opposite sides with threaded `open ings operating as nuts and engaging the threads of the shaft l, whereby when the latter are rotated by the means4 hereinafter described the casing will be advanced on them and will carry the gearing with it.

The transverse casing is composed of upper and lower bars or sections 26 and 27, hinged together at one side of the device at 28 and having their other ends detachably connected bya key29,which engages an opening ofan arm 30, carried by the lower section or bar and extending through the upper section or bar. This construction permits the feeding device to be readily disengaged from the threaded shafts after the auger has been advanced as far as possible by its connection to the central gear, and after the casing has been opened it may be moved rearward to its initial position near the rear ends of the shafts. The side gears can then be moved back to the casing, after which the central gear is disconnected from the auger, whichis left in the hole, and Jthe said central gear is placed in its bearing in the casing or feeding device, and an extension or auger section 3l is connected with the auger or bit 2 to enable the hole previously cut to he deepened. The upper and lower sections of the casing or feeding device are provided with side recesses 32, which form the threaded openings for the shafts,and they have central recesses 33, which are smooth, to form a bearing for a hub or extension 34: of the central gear-Wheel 22. The central v gear-wheel 22 is interiorly threaded to form a socket for the reception of the rear ends 35 and 36 of the auger or bit 2 and the auger section or extension 3l, which are threaded to engage the said socket. The front or outer end of the auger section or extension 31 is provided with a threaded socket 37 to enable it to be coupled to the rear end of the bit or auger 2.

The rear ends of the threaded shafts are squared to receive a crank-handle 38, which is adapted to be arranged on either of the shafts to suit the convenience of the operator and the position of the machine, and the handle 38 is detachably secured to the shafts by a winged nut 39.

The invention has the following advantages: The drilling-machine, which is simple and comparatively inexpensive in construction, is easily operated and is capable of adjusting the auger orbit vertically and later` ally, and the machine is supported in its lateral adjustment by the curved guide, which projects laterally from each side of the front end of the bracingrod. Either of the threaded shafts may have the crank-handle attach ed toit, so that the machine may be operated from either side to suit the convenience of the operator and to enable the machine to be operated in positions in which it would otherwise be inoperative. The sectional feeding device, which engages the threads of the shafts, is adapted to be readily disengaged from the same to enable it to be quickly returned to its initial position. The crossbars which connect the front and rear portions of the shafts are detachably mounted in the front and rear supports and may be readily disengaged therefrom, and the rear support serves as a fulcrnxn for the operating mechanism, which is adjusted vertically on the front support, and as the rear portions of the shafts are adapted to move freely longitudinally through the openings or bearings of the rear cross-bar 9 the front cross-bar may be arranged in any pair of the recesses of the front support without adjusting any devices to vary the distance between the front and rear supports.

Changes in the form, proportion, size, and the minor details of construction within the scope of the appended claims may be resorted to without departing from the spirit or sacrificing any of the advantages of this invention.

What is claimed isl. A drilling-machine comprising a pair of threaded shafts, an auger, gearing connecting the auger with the shafts and adapted to slide on the latter, and a feeding device supporting the gearing and having threaded open ings to engage the threads of the shafts, said feeding device consisting of a casing co1nposed of two sections hinged together at one side of the machine and having their other ends detachably connected, substantially as and for the purpose described.

2. A drilling-machine comprising frontand rear supports, a cross-bar provided with bearing-openings and trunnioned in the bearings of the rear support, parallel threaded shafts having their rear ends loosely journaled in the bearing-openings of said cross-bar, a yoke connecting and having journal-bearings for the front ends of said shafts, and adjustable up and down on the front support, an auger parallel to and arranged between the shafts and supported by said yoke, and gearing operatively connecting the auger with the shafts, substantially as described.

3. A drilling-machine comprising a drill, front and rear supports therefor, means for adjusting the working end of the drill up and down on the front support, a depending pivot on the front support, an anchor having its rear end slotted and terminally perforated to receive said pivot, and a rod connecting said ICO IIO

journaled in the rear cross-bar, an auger, and means connected withl the auger and the shafts for rotating and feeding the former, I5 substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two Witnesses. v

CHARLES SCHMIDT. Witnesses:

THos. J. SCALES, W. A. CARTER. 

